Calculate the mass of silicon (| V) oxide, which is formed when 60 g of silicon is burned in oxygen, in which 5% is incombustible.

The combustion reaction of silicon is described by the following chemical reaction equation:

Si + O2 = SiO2;

Let’s find the mass of pure silicon:

m C = 60 x 0.95 = 57 grams;

Let’s find the amount of substance in this mass of silicon:

N Si = 57/32 = 1.7813 mol;

Find the molar mass of silicon dioxide:

M Si O2 = 28 + 16 x 2 = 60 grams / mol;

Find the mass of 1.7813 mol of silicon dioxide:

m Si O2 = 1.7813 x 60 = 106.89 grams;